屏蔽常数

词组短语

screening constant · shielding constant

与屏蔽常数相关的网络例句 [注：此内容来源于网络，仅供参考]

As an example, we note that the relativistic correction to the hydrogen shielding in hydrogen iodide is about 15 ppm at the Hartree-Fock level, an effect that exceeds the normal shielding range of protons.

本文第二章首先引入了一种含有相对论效应的拟相对论的Hamiltonian，并运用到汞和碲等重核元素的核磁屏蔽常数和化学位移的量子化学从头算研究中。

The relations of inducing skin current of shielding layer, core voltage and core current with the environment field were obtained. The change of shield layer current wave with grounding state of external shield and core voltage with loading resistance was analyzed. According to the dependence of shield layer current oscillating frequency on electromagnetic wave propagation velocity, conception of transporting line of shield layer-ground with equivalent relative dielectric constant was presented. fited equation of equivalent relative dielectric constant with change of cable height was given.

试验得到九芯电缆屏蔽层感应电流、芯线感应电压、芯线感应电流以及环境场之间的关系；分析了皮电流波形随外皮接地状态的变化，芯电压随负载电阻的变化；基于皮电流振荡频率与电磁波传播速度的关系，提出了屏蔽层-大地"传输线"等效相对介电常数概念，给出了等效相对介电常数随电缆高度变化的拟合式；皮电流计算与测量结果在波形、振荡周期、衰减规律等方面有较好的一致性。

The exact effective nuclear charge numbers have been defined andcalculated with the mean radius of the initial orbital of the active electron toconsider the combined -effects of relativity and screening in an actualtranstition calculation . The electron impact ionisation cross sections and thecorresponding ionisation rate coefficients of Li like ions 〓、〓、〓、〓and〓 have been calculated by using our calculated effective nuclearcharge numbers.

我们考虑并修正了原始理论中对屏蔽常数物理意义的不正确定义和算法，更精确考虑了其它电子对被电离电子的屏蔽效应以及相对论收缩对有效核电荷数的影响，得到了更可靠的有效核电荷数，并给出了更好的电离截面结果。

Since the output signal from fringing field dielectrometry sensors under a low frequency driving voltage are very low, the shield-drive, signal buffer and band-pass filter are adopted to improve SNR. With the signal gain and phase angle from a transform circuit, the complex permittivity of pressboard are obtained.

鉴于边缘场电容式传感器在低频正弦驱动信号作用下输出的感应信号非常微弱，调理电路采用驱动屏蔽方式进行测量信号缓冲，用带阻滤波器提高信噪比，并利用相应的变换电路求出电容系统的相位角和幅值增益，从而得到绝缘纸板的复介电常数。

This dissertation involves the study of the growth dynamics of colloidal particles under unequilibrium and irreversibility condition. Firstly, it is of interest to investigate whether the ideal diffusion or reaction-limited aggregation universal behavior can be observed for the initially polydisperse practical system of basic yttrium carbonate as well. The fractal structure of basic yttrium carbonate aggregate cluster was observed using transmission eletron microscopy. The aggregation kinetics of basic yttrium carbonate colloids was studed using dynamic 1ight-scattering techniques. At 1.00mol/l NaCl solution the fast diffusion-limited aggregation behavior was observed with an increase in the aggregate size over time described by a power law. The aggregates are characterized by a fractal dimension D=1.82. The disordered and ramified cluster is consisted of primary colloidal particles and tenuous and more open. These are in good agreement with those observed for other colloidal system such as colloidal gold (1.86), silica (1.85) and polystyrene latex (1.82) in diffusion-limited aggregation from the static and dynamic light scattering by Lin. Therefore ideal diffusion-limited aggregation behavior can be observed in practical polydisperse system as well. Smoluchwski and fractal theories were used to obtain the aggregation rate constant for initially polydisperse system for the first time.

本论文研究胶粒的非平衡不可逆聚集动态学，分为两个部分，第一部分是通过实验研究一个新的初始多分散的碱式碳酸钇胶粒实际体系中，聚集标度性质的普适性，即使用透射电子显微技术观测聚集粒子簇的分形结构，使用动态激光光散射研究碱式碳酸钇胶粒的聚集动力学，胶粒带电而产生静电排斥作用使得碱式碳酸钇胶粒处于稳定状态，当加入电解质NaCl溶液时，碱式碳酸钇胶粒间的Debye-Hückel屏蔽距离缩短，从而降低静电排斥能垒，引起胶粒发生不可逆聚集，加入电解质NaCl的浓度为1.00mol/l时，碱式碳酸钇胶粒进行快速聚集，经历扩散控制聚集机理，形成结构疏松、更为开放的分形聚集粒子簇，其分形维数为1.82，碱式碳酸钇胶粒聚集增长动力学遵循幂函数增长规律，与Lin等使用静态激光光散射和动态激光光散射测量硅胶(1.85)、金胶(1.86)和聚苯乙烯胶乳(1.82)在扩散控制聚集状态形成聚集粒子簇的分形维数值以及粒子簇聚集增长的动力学规律相一致，表明胶粒聚集标度性质的普适性质在初始多分散的实际体系中也是存在的，首次由动态激光光散射的实验数据得到初始多分散胶粒分形粒子簇的聚集速率常数，并且其值与Smoluchowski聚集速率理论预期相符。

Inverter with shielded cable, use a small dielectric constant, high-pressure polyethylene for insulation.

变频器用屏蔽电缆，选用介电常数小的高压聚乙烯作绝缘。

Performed tests based on seven kinds of important structural parameters which were wall thickness, shielding thickness, the radial wall shielding insertion depth, the width of the radial electrode, the electrode width, the relative dielectric constant of wall material and filler shield relative dielectric constant, and studied on structural parameters and the corresponding performances by RBF neural network, the optimization based on PSO was performed with the regression model.

该方法以敏感场整体灵敏度大小等系统性能为优化目标，基于管壁厚度、屏蔽层厚度、径向屏蔽插入管壁深度、径向电极宽度、电极宽度、管壁材料的相对介电常数、屏蔽层填充物相对介电常数7种重要的结构参数进行试验。应用RBF神经网络对多组结构参数以及对应的系统性能指标进行学习，得到回归模型，并应用粒子群算法进行寻优。

与屏蔽常数相关的网络解释 [注：此内容来源于网络，仅供参考]

faraday constant：法拉第,法拉第常数

Faraday cage 法拉第筒(静电屏蔽),法拉第笼,法拉第屏蔽,法拉第氏罩 | Faraday constant 法拉第,法拉第常数 | Faraday cylinder 法拉第圆筒

constant, Rydberg：苪德柏常数

苪德柏常数 constant, Rydberg | 屏蔽常数;屏蔽恒量 constant, screening | 史特凡常数 constant, Stefan's

screening effect：电子屏蔽

screening constant 屏蔽常数 | screening effect 电子屏蔽 | screening experiment 屏蔽实验

screening effect：遮蔽效应

screening constant 遮蔽常数 | screening effect 遮蔽效应 | screening material 屏蔽材料

screening constant：屏蔽常数

screening can 屏蔽外壳 | screening constant 屏蔽常数 | screening doublet 屏蔽偶极天线

nuclear screening constant：核屏蔽常数

nuclear science ==> 核科学 | nuclear screening constant ==> 核屏蔽常数 | nuclear selection rules ==> 核选择定则

screening constant; screen number：屏蔽常数;屏蔽恒量

"屏蔽;筛滤","screening" | "屏蔽常数;屏蔽恒量","screening constant; screen number" | "屏蔽效应","screening effect"

constant, screening：屏蔽常数;屏蔽恒量

苪德柏常数 constant, Rydberg | 屏蔽常数;屏蔽恒量 constant, screening | 史特凡常数 constant, Stefan's

screen-grid tube：帘栅管,萤幕栅极管

"screen constant ","屏蔽常数" | "screen grid tube ","帘栅管,萤幕栅极管" | "screen potential ","[电子射线管的]屏电势"